API 682 Standard Mechanical Seals

High-Performance Mechanical Seals for Global Industry

Engineered to prevent fluid leakage under extreme pressure, temperature, and corrosive environments. Worldwide manufacturer and supplier of standard, heavy-duty, and customized sealing systems.

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15+

Export Countries

24Hr

Standard Dispatch

100%

Leak Tested

API 682 Compliant

Designed to Category 1, 2, & 3

ISO 9001 Certified

Rigorous Quality Controls

Custom Engineering

OEM Reverse-Engineering

Global Distribution

Fast Shipping & Support

Corporate Profile

Engineered Sealing Integrity

Precision Seals is an industrial leader in the research, design, and manufacture of heavy-duty mechanical seals. We provide long-term, high-reliability solutions that minimize downtime and protect critical environments from hazardous fluid leakage.

Our expert engineers develop sealing systems that directly fit compressors, chemical reactors, agitators, dyeing machines, and rotating shaft machinery. Whether you need custom engineering or quick replacement seals, we are your trusted global partner.

API Plan 52, 53A, 53B, & 54 auxiliary sealing systems
In-house FEA testing and precision face-lapping (.0003mm flatness)
Direct drop-in replacements for standard pump models

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Industrial Applications

Engineered for Seven Key Industries

Power & Energy

Designed for boiler feed pumps, condensate pumps, and gas turbines operating under high pressures and extreme temperatures.

Chemical Processing

Prevent leakage of hazardous, corrosive fluids in agitators, mixers, and chemical reactors using specialized alloys like Hastelloy.

Oil & Gas

Compliant with API 682 regulations. Built to withstand volatile fluids, methane emissions, and extreme hydrocarbon environments.

Pharmaceuticals

Hygienic, dry-running, and barrier-fluid cartridge designs that prevent product contamination and support sterile processing standards.

Textile & Dyeing

Corrosion-proof seals built for high-temperature dyeing machines, withstand aggressive dye liquids and fiber clogging.

Food & Beverages

Hygienic, FDA-compliant mechanical seals designed for mixers, agitators, and pumps handling dairy, beverages, and food ingredients.

Marine & Shipbuilding

Sea-water corrosion resistant seals manufactured in Duplex Stainless Steel and marine-bronze for main propulsion shafts and ballast pumps.

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Catalog Highlights

Featured High-Performance Seals

Cartridge Seals

Heavy Duty Double Cartridge Seal

Designed for critical, zero-emission chemical processing applications. Operates with pressurized barrier fluid to guarantee leak-free shaft rotation.

Pressure LimitsUp to 30 bar

Temperature-40°C to 220°C

Shaft Size25mm to 100mm

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Standard Seals

Multi-Spring Balanced Seal

High-reliability seal for general chemicals, hydrocarbons, and industrial process pumps. Features independent springs for uniform face loading.

Pressure LimitsUp to 20 bar

Temperature-50°C to 200°C

Shaft Size18mm to 120mm

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Bellow Seals

Double Metal Bellow Cartridge

Engineered for high-viscosity and high-temperature oils. Metal bellows eliminate dynamic O-rings, preventing seal face hang-up.

Pressure LimitsUp to 25 bar

Temperature-20°C to 300°C

Shaft Size24mm to 85mm

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Reactor Seals

Dry Running Agitator Seal

Designed for pharmaceutical and food mixing reactors. Does not require barrier fluid lubrication, preventing product contamination.

Pressure LimitsFull Vacuum to 6 bar

Temperature-30°C to 150°C

Shaft Size40mm to 150mm

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Explore All Product Designs

Engineering Excellence

Raw Material & System Standards

Seal Face Materials

Silicon Carbide (SiC): Reaction-bonded and self-sintered for extreme hardness and chemical inertness.
Tungsten Carbide (TC): High mechanical strength, ideal for high pressure and abrasive slurry pumps.
Antimony-Impregnated Carbon: Self-lubricating property for chemical and refinery applications.

Elastomers & Metallurgy

Kalrez (FFKM): Thermal stability up to 327°C with near-universal chemical resistance.
PTFE Bellows: Flexible acid-resistant barrier with dynamic sealing.
Hastelloy-C / Alloy 20: High nickel alloy springs and components for critical acid services.

API Plan Auxiliary Systems

API Plan 52: Unpressurized buffer fluid reservoir to capture process fluid leakage.
API Plan 53A/B: Pressurized barrier fluid loop for high-hazardous fluid applications.
Thermosyphon Vessels: Circulation support for cooling and lubrication of double seals.
API Gas Plan 70: Leakage detection and vent management systems for containment gas seals.
API Gas Plan 71: Unpressurized buffer gas system to prevent process fluid contamination.

Worldwide Distribution

Exporting to Global Industrial Hubs

We supply heavy-duty mechanical seals to plant operators and rotating equipment distributors in key international markets, offering prompt technical engineering support and quick shipping routes.

🇦🇪 Dubai, UAE

🇸🇦 Saudi Arabia

🇶🇦 Qatar

🇰🇿 Kazakhstan

🇧🇩 Bangladesh

🌍 African Hubs

FAQ Support

Common Procurement Questions

For standard seal replacements, we ship within 24-48 hours. Custom engineered seals typically take 2-4 weeks from initial engineering approval to manufacturing and dispatch, depending on the complexity of the design.

Yes. Our cartridge and heavy-duty double seals are designed, tested, and manufactured in accordance with API 682 (Shaft Sealing Systems for Centrifugal and Rotary Pumps) standards, ensuring safe operation in oil, gas, and petrochemical processes.

Absolutely. We regularly reverse-engineer and retrofit direct replacements for major brands like John Crane, Burgmann, Flowserve, and Chesterton, offering identical dimensional fits with enhanced material combinations at a more competitive cost.

We utilize high-end seal face materials such as reaction-bonded Silicon Carbide (SiC) and Tungsten Carbide (TC). For elastomers, we supply Viton, EPDM, and genuine Kalrez (FFKM) O-rings. Springs and metallic housings are made of Stainless Steel 316, Duplex, or Hastelloy-C.

Request a Technical Quote

Discuss your sealing application with our mechanical engineering experts. Submit your requirements to receive a detailed quotation and CAD assembly drawing.